Seldinger Technique
tải về 0.6 Mb. Chế độ xem pdf
|
- Điều hướng trang này:
- Gelfoam Embolization
- P VA Particles Used in bronchial artery embolization and Uterine fibroid embolization etc. PV A Particles
- Uses of PVA
| Gelfoam Pledgets
Gelfoam Torpedo If a very proximal occlusion is desired, Gelfoam "torpedoes" can be formed by compressing and rolling strips of Gelfoam, which are then loaded into the nozzle of a 1- or 3-mL syringe. For more distal embolization, a slurry of Gelfoam can be created by macerating the pledgets with two syringes and a three-way stopcock: the more passes the Gelfoam makes through the stopcock, the more it is fragmented and the smaller the pieces become. Gelfoam Embolization Gelfoam embolization provides a temporary occlusion lasting approximately 3 to 6 weeks. Used for embolization of pelvic trauma or postpartum hemorrhage, especially when there are multiple punctuate bleeding sites from various branches of the internal iliac artery. In such situations, embolization should be initiated with Gelfoam slurry to achieve a relatively distal level of occlusion and then followed by Gelfoam pledgets or torpedoes. PVA Particles Used in bronchial artery embolization and Uterine fibroid embolization etc. PVA Particles - Polyvinyl alcohol (PVA) is essentially a plastic sponge that is fragmented and then filtered to a certain size range. - PVA is available in sizes between 50 and 2000 um, the typical size ranges used clinically are 300 to 500 um or 500 to 700 um. - Smaller particles have a significant risk of tissue infarction due to their distal level of occlusion. Larger particles may occlude the delivery catheter Uses of PVA • Predominantly for tumor embolization, either for preoperative devascularisation or as definitive treatment, such as in uterine fibroid embolization, JNA embolization. • PVA can be used when treating hemorrhage of a vascular bed with multiple small branches e.g. hemoptysis in patients with chronic inflammatory lung disease. • Prior to bronchial embolization, the presence of a spinal artery originating from the treated vessel should be excluded. tải về 0.6 Mb. Chia sẻ với bạn bè của bạn:
|